shithub: rc

ref: 7fd1655df9afc31dd60db92ebd81b3f479e7d865
dir: /bin/unspr/

#!/bin/rc
if(! ~ $#* 2){
	echo usage: $0 pal spr
	exit usage
}
awk '
function hex(s, v){
	if(s ~ /^0x/)
		s = substr(s, 3)
	for(n=1; n<=length(s); n++)
		v = v * 16 + h[substr(s, n, 1)]
	return v
}
BEGIN{
	for(n=0; n<16; n++){
		h[sprintf("%x", n)] = n
		h[sprintf("%X", n)] = n
	}
}
FNR == 1{
	x = $2
	y = $3
}
FNR == NR{
	sub(/0x/, "")
	gsub(/../, "0x& ")
	split($0, a)
	c[i,3] = hex(a[1])
	c[i,2] = hex(a[2])
	c[i,1] = hex(a[3])
	i++
	next
}
{
	if(FNR == 1){
		printf "     r8g8b8           0           0%12d%12d ", x, y
		next
	}
	for(i=1; i<=NF; i++){
		n = $i + 1
		printf "%c%c%c", c[n,1], c[n,2], c[n,3]
	}
}
' $1 $2